Arc-lamp.



T. L. CARBONE.

, RG LAK?.

Hummm! Num ma. 19, 199e.

Patented Nov.15,1910

v-rrl ESSES Q l Y i.

TITO LIVIO CARBONE,.OF CHARLOTTENBURG, GERMANY.

ABC-LMP.

Speeieeon of Letters Patent.

' fw *a applicati@ med Mam 1s, 1909. rial no. 484,552.

Patcntdlov. 15

To 'all i/om 1' t may concern: Be it known that I, Trio Livio Cannone,

'n citizen of the Swiss Republic: residing ,at

( linrlotlenlnn'g. near Berlin, Germany, have invented certain new anduseful Improvements in .irc-Lamps; and l do hereby declare the followingto be .fr full, clear., and exact description of the invention, suc: aswill enable others skilled iii the art to which itnppertains to maireuse the same.

The presentinvenion relates to arc lamps for lowr lighting hours andllas the object of keeping clean the part ot the globe from to obscnrethe arc.

which the light mainly issues, especiallj7 in case of the employment ofimpregnated cnrbons.

The use of the flaming a rc is connected with the disadranmge ofrequiring a globe or inclosure for lie ereg-:mil the vaporsinvarialil'yv givenotl by the flaming are 'of impregnated or othercarbons yield deposits which cloud the transparent. Walls and tendAttempts 'have been made to overcome this diiculty by utilizing the heatof the arc to set up a vigorous circulnion of the-gazses'at t-licinterior of ille globe by providing a more or less highly organizedexterior circulate?? system for ile purpose of returning the ,Claseswhich 'nare been forced out at the tonto the, bottom of tile globe.These gases ca ry the vapors :1v-'a5' from tite :irc and dep sit tilecondensati i in the cooler parts ci the circuultoiy sut-.siem arrangedto receize them outside of the arc-inclosing globe itself. In suchattempts as have been made to carry ont tliis'arrzingerncnt, :i numberof difficulties have been encountered. For instance, some definiteconstruction must be employed for the purpose of returning' the gasesdownwardly from thc are to the lower end of the globe. These channels.oeeessarilv` obstruct the an more or less and preventit from deliveringiis full illuminating eiiect, cutting down its eiiiciency and in someiiistances costing: large shadoirs.- These diiliculties are independent,of the complexity and elaborate structures that become neces' sary. Y

The objeel of the presentinvention is to eliminate these difficultiesand attain the de.- .sired result in :i more direct4 manner and bysimpler and ex'iensive means.

As a result of :noch testing and experimental work,'xne:ms were devisedwhereby the (lesite-l result. may-be accomplished and simplified.

at the mine time the circulatory .sj-siem much The necessity of anyoutside duct or ducts for the. return of the gascs to I the lowerportion of the arc-space is dispensed with and the Whole structuresimplified by redncing the same to a le globe or inclosure which isprovided rality o chambers suitabiyconnee embodiment of my invention .Tgiven excellent results, has three smh -cham bers arranged one above theother, the middle chamber being transparent and containing the arc,which cliarnoer, for the best livht emitting and distributing may beconical in shape with the walls preferably brought, into more or lessnroximity io the are, so as to better subserre me eorts of maintainingits surface free from deposits. i

It is thought that the gases rising around the upper electrode arecooled in the upper chamber and fumes deposited therein and t at tliecooled gases llow along ille outer part of the globe adjacent to thewell. The heat adiacent tie arc would ne ,sueient to prevent the depositof the fumes, bn.. around the lower electrode the den of "as '-sounl hequalities.

slow enough to permit suspenda: particles to fall in the lower chamber.

Tests have been conducted with diicrent makes or' impregnatedarc-carbone with uniform insulter-the globe remaining clear for upwardor' 3.50 hours, and this with a single trim or supply of carbons. I havefound tiatexcellent results are obtained vwhen a depositing space isprovided both a'oove and below. lt was soon found that when one or bothY chambers were omitted., the deposit would encroach and would partiallyobscure the lightemitting. wall surrounding ille are. As a means ofsecuring'a, clear line oi demarcation of the'deposits and preventingtheir encroachment upon the transparent wall immediately surrounding thearc, a change of angle or inclination of the nali with respect to the.are or general aline' ment of electrodes is found eectiy, and an innerridge or contraction will acc-n this result.- Of course,'a clear lin ocmarwtioxr is not n all cases necessary, :uid any means of confining, toa greater or less extent, the deposits, y will fulfil theconditions,-the necessary feature being an organization whereby thephenomenon of diffusion operates to carry the vapors produced at the arcaway from the light-emitting wall l s i l l l l i i before they arecondensed and the oxids or other solids deposited.

The present invention consists in providing :i separate chamber for theare bj: ornr ing zx, series of circular contractions in the globe, vsothat it. is divided into several snperposed chambers. By this devicetlie heat of the are is concentrated in the middle member, butat thesame time the walls of elle middle chambers are protected by theirconical shape against decomposition and can therefore be arranged closerto the are ing partl;` of glass and partly of metal. than was possiblehitherto. The advantage of this arrangementis tl'iat no gases areconinclosing the are.

Figures l 1.o l of the accompanying draw- Y orugas contractions in theWall. the middle chamber l having the. shape of an inverted cone and itsinto a plurality of snperposefl chambers by ings slioir severaldillercnt forms of globes according to my invention and it will 'nenndorstood tliaL the globe may taire-.a great many dill'erent formswithoutdepartingr from the spiritof the inventio i A, E, C are tliethreechambers partiallydivided into three superposed chambers bj,YV separatedby the contractions :n the all of the globe.

of a .suitable metal. It has been found by xperixnent that, with thisarrangement, the z lower chamber immediately below the transu Pcondensed gases from the imoref'nated carlions :ne deposited only in theupperand integral therewith. lower chambers A and C, While the Wall of gthe chamber B remains free from deposit use with impregnated orflame-arccarbone,

and tllerefore transparent.

1n .r rg. l the part of the Wall of the globe marked D.

I claim:

l. An arc-lamp globe specially adapted to the use of impregnatedcarbons,.and divided into a plurality of snperposed cliamlrfers bv diechamber aving a transparent wall surrounding tlie arc closely forpreventing the gases produced by the are from condensing on said walls.

2. An are lamp globe specially adapted to ile use of impregnatedcarbons, and divided lato three superposed chambers by suitable Thesechambers may lie made j chamber haring a. transparent wall surwnolly-oiglass or partly of glass and partly I suitable eontigumtion of tlieWallgtlie. walls of the, ninulle chamber surrounding the are as closelY:is possible, the sind walls consist- 4. ln :in arc-lamp, a globe orinclosnre for use with impregnated or llame-are earbons,

denied o'n the Walls of the middle chamber divided into three snperposedchambers by suitable contractions in the walls, the middle chamberHaving a transparent Wall snrroitniin; le. are. and a S.-paration orjoint at the upper @nl of the middle chamber lietween it and theclian'zber above.

5. In an arc-la nip, e. globe or inclosure for use with impregnated orfianie-are oarbons,

suitable Lenti-actions in the walls, the middle rounding the are, anupper chamber separated from said middle chamber. and a parent Wall ofthe middle chamber and made 6. In an arc-lmnp, a zglobe or inelosiu'efor divided into three superposed chambers by suitable contractions inthe Walls, the middle that 1s kept free et the condensed gases ischamber having :1v t1{.nsparent Wall surrounding the are, an opperchamber sepatherewith and closed at the lower end. suitable contivnration of the \rallstlae niid- TITO LIVIO CARBONE.

Witnesses ll' emanan HAUPT 7 Hman HASH-1R.

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